A modeless dialog window enables users to interact with other windows while the dialog window is present. Use this type of dialog window when the requested information is not necessary to continue. Modeless dialog windows do not keep the input focus so you can work on two applications at once.
A modeless dialog window is commonly used in menus and help systems where the user can use the dialog window and the application window concurrently. For example, a toolbar is a modeless dialog window because it can be detached from the application and the user can select items in the toolbar to apply features to the detached or separated application.
You can show the C1Window control as a modeless dialog box using the Show method.